Web supply mechanism



P v 1939- A. LUNDQUIST ET AL 2,155,430

WEB SUPPLY MECHANI SM Filed De. 2, 19:53 10 Sheets-Sheet 1 |NVENTORS.

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April 25, 1939. A, LUNDQUIST ET AL WEB SUPPLY MECHANI SM 10 Sheets-Sheet 2 Filed De c. 2, 1935 Apri] 25, 1939. A. LUNDQUIST ET AL WEB SUPPLY MECHANI SM Filed Dec. 2, 1935 10 Sheets-Sheet 4 INVENTORS.

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April 25, 1939. A, LUNDQUIST ET AL WEB SUPPLY MECHANISM Filed Dec. 2, 1953 10 Shecs-Sheet s INVENTORS;

A. LUNDQUIST ET AL April 25, 1939.

' I WEB SUPPLY MECHANISM l0 Sheets-Sheet 6 Filed Dec. 2, 1933 April 25, 1939. A. LUNDQUIST ET AL 2,155,430

WEB SUPPLY MECHANISM Filed Dec. 2, 19:53 1o Sheets-Sheet 7 FIG-J6;-

INVENTORS.

. 7f iaan A. LUNDQUIST ET AL April 25, 1939.

WEB SUPPLY MECHANISM Filed Dec. 2, 1935 10 Sheets-Sheet 8 April 25, 1939.

A. LUNDQUIST ET AL 2,155,430

WEB SUPPLY MECHANISM Filed Dec. 2, 1933 10 Sheets-Sheet 9 A ril 25, 1939. 7 A. LUNDQUIST ET AL 2,155,430

WEB SUPPLY MECHANISM Filed Dec. 2, 1955 10 Sheets-Sheet l0 I g myzu-rons 5" A-rfv.

Patented Apr. 25, 1939 V UNITED STATES PATENT OFFICE WEB SUPPLY MECHANISM Application December 2, 1933, Serial No. 700,652

28 Claims.

This invention relates to web supply mechanism for machines, such as, printing machines that operate on webs fed from web rolls, and has particular application to high speed rotary printing machines that are used for printing newspapers and similar products.

It is desirable in press operation to replace the expiring web rolls in a printing machine with new rolls while the press is operating at high speed. Various types of mechanism have been provided for this purpose, some of which are operated entirely automatically while others operate on a semi-automatic principle.

The structure to which the present invention is applied, is in many respects simular to the structure disclosed in a copending application, Serial Number 596,508, now Patent No. 2,071,440 of February 23, 1937, but in the present case, instead of being automatically controlled, certain movements are manually controlled. The

speed of operation, however, is not retarded by the partial manual control.

Improved means are also provided for controlling the rotation of the roll during acceleration and deceleration of the machine.

Among the objects of this invention, one is to provide a web supply mechanism for machines that run at high speed while operating upon a web of material, in which the web fed from an exhausting web roll may be replaced with web from a. replacement roll without reducing the speed of the machine.

Another object is to provide a mechanism for accelerating a replacement roll preparatory to making a web join and for maintaining a constant tension on the web fed to a printing machine, by varying braking pressure upon the web roll and having means controlled by the movement of a floating web guide roller to vary the said braking pressure when a change in tension occurs in the running web.

Another object is to provide an endless belt to engage the peripheral surface of a web roll and Figure 3 is an enlarged view looking in the direction of the arrow 3 of Figure 2 showing a rear elevation of one end of the web deflecting and severing mechanism with parts broken away;

Figure 4 is an end view of the parts shown in Figure 3 looking in the direction of the arrow Figure 5 is a plan view loci-ring at one side of the machine, showing the web tensioning belt mechanism for the web roll and the driving means therefor;

Figure 6 is an enlarged detail view of a motor cut-out switch operable by the swinging movement of web deflector frame;

. Figure 7 is an enlarged detail view showing a solenoid operated latch member on the web deflector frame and an anchoring arm therefor;

Figure 8 is a section taken in the direction indicated by the arrow 8 on Figure 7;

Figure 9 is an inverted plan view of the web severing mechanism taken in the direction of the arrow 9, Figure 4, and showing the cutting knife in a retracted position;

Figure 10 is a view similar to Figure 9 showing the cutting knife in a released or web cutting position;

Figure 11 is an end view taken in the direction of the arrow ll onFigure 9;

Figures 12, 13, 14 and 15 are sectional views taken in the direction of their respective arrows on Figure 9;

Figure 16 is substantially a vertical section, on the line It, Figure 17, through a motor used to vary the movement of the web tensioning mechanism; r

Figure 17 is .an end view of the motor shown in Figure 16 with a part broken away;

Figures 18, 19, 20 and 21 are diagrammatic views showing positions of some of the major components of the web supply mechanism dur- Figure 24 is a wiring diagram of the electrical.

switches employed in the control of the web roll supply mechanism.

Referring to Figures 1 and 2 of the drawings, reference character 25 indicates one side member of a printing machine base frame, another side member 25a being shown in Figure 5. Between said members 25 and 25a are supported the usual web guide rollers 26, while above same, the usual printing mechanism not included in this invention is mounted. I

A reel 21 is rotatably mounted upon a shaft 28 which shaft is carried by pedestals 29, the upper ends of same being shown in Figure 2. A motor drive means indicated at M of the wiring diagram is connected in driving relation with the shaft 28 and is energized periodically by pressing one of two buttons Ma, 3") to energize the motor circuit and cause the motor M to rotate the said reel. Web rolls 32 are supported on arms 33, projecting outwardly from' the reel 21, in any conventional manner. In Figure 1, one web roll 32a. is shown mounted on the reel in an uppermost position and has the web W feeding therefrom over the guide rollers 26 which will be referred to hereinafter as the running web roll. In Figure 2, another web roll 32!) is shown as having taken the place of the aforementioned .running web roll 32a, and will be referred to hereinafter as the replacement roll,

The normal running position for the running web roll is the uppermost position as shown in Figure l, but after the roll has been reduced to a certain predetermined diameter, an attendant will energize the motor circuit to rotate the reel in a counter-clockwise direction by pressing the push button 31a, whereby the reel will be rotated to move a replacement roll into the upper position to be joined with the web running from the expiring roll, which latter roll will have been moved downward to the position shown in Figure 2.

It is desirable to maintain a constant tension on the running web at all times to accomplish thefnest results in printing machines of the high speed type. By means of a mechanism according to one of the features of this invention, any slight variation in tension upon the running web is immediately corrected, by increasing or decreasing a braking pressure which is constantly applied to the running web roll.

Said mechanism comprises one or more endless belts 34, guided over pulleys 35, 36 having fixed axes and a third pulley 31 having a movable axis. The pulley is mounted on a shaft 38 journalled in bearings 33, which bearings are secured to the side members 25, 25a of the machine base frame. A suitable drive is provided for the shaft 36 through gearing indicated at 4| and a sprocket and chain connection 42, which are preferably driven from a driving source in the machine, such as, indicated by the shaft 46. Said gearing 4| is timed to maintain the running speed of the belt at a speed which is slightly slower than that of the running web so as to provide a constant braking action on the web roll, which is varied according to the amount of wrap provided by the belt around the web roll and by the belt tension.

The pulley 36 is rotatably mounted on a shaft 43 journalled in bearings 44 which are also secured to the base frame members 25 and 25a, said shaft 43 also having arms 45 fixed thereto (Figure 5), positioned at either side of the pulley 36. A short shaft 46 is rotatably mounted between the projecting ends 41 of said arms 45 and has secured thereto a pair of downwardly projecting pivotal arms 48, between which a pulley 31 is rotatably mounted on a shaft 49. One of said pivotal arms has an upwardly projecting end 5| which has a coil spring connected thereto, the other end of which spring is attached to a stationary cross bar 53 secured between the arms 45, and is adapted to rock the pivotal arms 33 outward to cause the pulley 31 to apply a tension on the endless belt 34.

While the above described endless belt mounting is described in the singular, it is to be understood that more than one mounting may be used. In the particular structure of this invention two belt mountings are provided at substantially the same distance from each side of the base frame members 25, 25a, in the same relation as that indicated in Figure 5, which shows the location in relation to the one side member 25a.

A motor 54, shown in detail in Figures 16 and Q 17, is mounted on the side member 2511., which motor is provided with a magnetic brake generally indicated at and a reduction gearing 56. A bevel pinion 51 meshes with a bevel gear segment 58 which segment-is keyed to the shaft 43. When said motor is energized, in a manner to be hereinafter described, the gear segment will be partially rotated in a clockwise'or counter-clock.- wise direction and thereby rock the shaft 43 and the arms 45 in the same direction. In so doing, the wrap of the belt upon the running web roll is increased or decreased in varying degree in response to variation in web tension and the braking pressure of same is varied accordingly.

It will be observed that by mounting the movable pulley in the manner described, it is possible to use a short swinging bracket for the movable pulley which is light in weight and does not require much space for movement. It will also be observed that the tensionof the spring 52 will increase as the wrap of the belt is increased and thus further increases the braking action of the belt.

The energization of the motor 54 is controlled by the movement of a floating web roller 53, which roller is mounted so as to engage the running web and change its position when the web tension is increased or decreased. The mounting for the floating roller comprises arms 6| and 62 which carry the said roller 59 at one end thereof,

and which have their opposite ends mounted on a shaft 63, said shaft being supported in bearings 64 secured to the side base frame members 25-25a.

A weight carrying arm 65 is mounted at one end of the shaft 63 as shown in Figures 1 and 2, and is adapted to support a weight 66 which is adjustably mounted upon a rod 61 suspended between two bearing portions 6868' on said arm. By the adjustment of this weight the pressure of the floating roller upon the web can be adjusted to set the tension at which the web is to be run. A cam shoe 69, formed at the end of an upward extension on the pivotal end of the arm 65, is positioned between two limit switches ll-12. Each of said limit switches has an arm l3-'l4 extending downwardly therefrom and each arm has a roller 1516 at the end thereof, positioned directly in the path of the cam shoe 68. Each switch is in a normally open position and is electrically connected with the motor 54 in such manner, that when either one of the switch arms 13, I4 is rocked, a circuit will be completed which will drive the motor 54 in a clockwise or counter-clockwise direction, to thus vary the braking action of the endless belt 34 upon the running web roll, as previously described, and thereby return the web to its normal running tension. The said rocking action of the switch arms is caused by the rocking movement of the cam shoe 68, through the movement of the floating roller 58, as the position of the roller changes, said change being due to an increased or decreased tension on the running web as it is drawn from the roll.

A uniform running tension on the web running to the machine is thus automatically maintained by means of the above described mechanism and is directly controlled by the movement or change in position of the floating web guide roller.

Having described the mechanism for controlling the tension of the running web, the mechanism for joining the web of an expiring web roll with that of a replacement roll and the means for severing the web of the expiring roll after a join is made, will now be described.

Referring to Figures 1 to 4, a twin frame structure indicated generally by the reference character 8|, comprises a web deflector frame 82 carried by a shaft 84 and a cutter supporting frame 83 carried by a sleeve both of which frames are movable about the same axial center. Said shaft 84 passes through the sleeve 85, which sleeve is journalled in bearings 86 forming parts of two brackets 81, depending from and secured to the base frame members 25-25a.. The twin frame structure is best shown in Figure 3 in which the mechanism located at one end and center of said frame structure are shown, it being understood that the mechanism on the opposite end will be in duplicate,

The web deflecting frame structure generally comprises two end arms 88 fixed on the outer ends of the shaft 84, which project beyond the ends of the sleeve 85, and have a beam 88 secured to the outer portions of the projecting ends thereof. Brushes 88 are mounted upon said beam which project outward and are adapted to be brought into engagement with the surface of the running web previous tomaking a join between the web of the expiring web roll and the web of the replacement roll, in such manner as will be hereinafter described.

The cutter supporting frame comprises two outer arms 8I and a centrally disposed arm 8Ia which are keyed to the sleeve 85, with the outer arms positioned adjacent to the web deflecting frame arms 88, and have a cutter supporting sheath 82 secured at the lower ends thereof as shown in Figures 9 to 11, between which a cutter 83 is slidably mounted. A handle 84 is secured to one arm 8I as shown in Figure 3.

The web deflecting frame and cutter supporting frame are normally joined together by means of a latch shown in Figure '1, which comprises a hook 85 adjustably secured to the web deflector frame beam 88, and a pin 86 secured at one end of a rocking lever 81, which lever forms part of a latch releasing mechanism assembled within a housing 88, on the arm 8Ia, and which will be hereinafter described.

It will be observed that since the twin frame members are latched together, they will thus move in unison when moved from a non-operating position as shown in Figure 1 to an operating position as shown in Figure 2. A heavy counterbalancing spring 88 is mounted over the sleeve 85, and has one end secured to a portion of the bearing 86 and the other end secured to a collar I8I keyed to the sleeve 85 as clearly indicated in Figure 3. The spring action is such that the tension upon same is increased when the frames are lowered, thereby retarding the downward movement and providing a counterbalancing efiect for the weight of the frame to permit same to be easily lifted. Another coil tension spring, indicated at I82 in Figures 1, 2 and 3, is tensioned between a flxed lug I88 on the bearing 38 and a lever I83 keyed to the shaft 84, the action of which spring provides the power means'for actuating the web deflector preparatory to making a join between the web of the expiring web roll and the web of the replacement roll. Said spring I82 also provides additional means to hold the frame structure in a raised position due to its movement off center as shown clearly in Figure 1. I

A shaft I84, (Figure-3) is rotatably mounted in bearings I85-485a on the cutter frame arms 9| and 8Ia respectively and has secured thereto a dog I86. A counterbalancing spring I81 is mounted over said shaft and has one end in engagement with the dog I86 and the other end in engagement with the bearing I85 and is tensioned so as to hold the end I88 of the dog against the peripheral surface of one of the bearing members 86 on the bracket 81. Two lugs I88-H8 are provided on the periphery of said bearing member 86 in the path of the end I88 of the dog I86 and are adapted to be engaged by said dogwhen the twin frame structure is in a lowered position as indicated in Figure 4 or when in a raised position. A handle I II is secured to the rod I84 to provide a means for manually releasing the ,dog I86 from the lug II8 when it is desired to swing the twin frame structure upward. When the twin frame structure is in a raised position, as in Figure 1, the end of the dog will engage the upper lug I89 which lug will function as a stop to prevent any further movement upward by the action of the tension spring I82 and when said twin frame structure is in a lowered position, the end of the dog will engage the lower lug I I8 and thereby cause the brush portion 88 of the web deflector frame and the sheath 82 of the cutter frame to be set in a fixed position with relation to the running web of the expiring web roll.

The pulling power of the tension spring I82 becomes effective at the instant the latch pin 86 is released from the hook 85, which release separates the web deflector frame from the cutter...

, be rocked about said stud II2 by means of the action of a solenoid magnet II5. Said solenoid has a plunger H6, and a link II1 connecting same with a bifurcated end of the lever 81. When energized, the plunger will be drawn into the solenoid and the lever 81 will be rocked about the stud II2, which movement will release the pin 96 from the hook and thereby allow the web deflector frame to be pulled forward-by the spring -I02 to a web joining, position shown in Figure 21. A stop H8 is provided on the plunger H9 to limit the inward movement of same and an adjustable stop screw I I9 is provided within one wall of the housing 99 to limit the downward movement of the lever. A spring I2I tensioned between one end of the latch pin 99 and an ear I22 on one wall of the housing 93 is provided to hold the pin 95 in normal engagement with the hook 95.

Before said latch releasing solenoid is energized however, a timing means which rotates with the replacement roll, is adapted to close the solenoid operating circuit at the desired time to allow the web deflecting operation to occur after an adhesive portion on said replacement roll has passed a position opposite the brushes on the web deflector frame. Said timing means will now be described.

The replacement roll 32b is mounted on a shaft I24, which shaft is journalled in bearings I25 provided on each arm of the reel 21. A means is provided for holding the end of the web of the replacement roll in engagement with the body portion thereof, as indicated at I23 and has a cam member I26 thereon which is rotatable with the replacement roll. A switch armI21, on a circuit closing switch I28, is normally positioned in the path of the cam I25 and is moved to close said switch I28 upon each rotation of said cam but is ineffective until a push button I29 on the arm 33, supporting the replacement roll, is depressed.

An adhesive may be provided on the outer surface of the end of the web replacement roll in any suitable manner for the running web of an expiring web roll to be brushed against by the brush portion 89 of the web deflecting frame 82' at the time a .join is made. One method of preparing the adhesive portion of a replacement roll for a web joining operation is disclosed ina copending application, Serial Number 578,270, now Patent No. 1,995,269 dated March 19, 1935.

When the expiring web roll is reduced to a diameter of almost complete exhaustion, as shown in Figure 2, the push button I29 on the replacement roll arm is pressed by the attendant and at the instant thereafter that the cam I29 moves the switcharm I21, a circuit will be closed to energize the latch releasing solenoid I I5. This condition occurs immediately after the adhesive portion has passed the brush contacting area of the web deflector frame 82 in order to allow sumcient time for the said web flector frame to swing forward when released move to 'a'web joining position. Due to the high speed at which the replacement web roll rotates, the time between the depression of the button I29 and the action of the latch releasing solenoid II5, is almost instantaneous.

The energization of the solenoid I I5 will therefore release the web deflector frame, to allow it to be pulled forward by the tension of the springs I32 and cause the brushes 89 to force the expiring web against thesurface of the replacement web roll as shown in Figure 21, and when the adhesive portion on said surface reaches a position opposite the brushes 39 the web end of said roll will adhere to the web of the expiring web roll and any holding means will be automatically released.

Immediately after the join is made, the cutter mechanism is actuated to. sever the expiring web by the action of a lug I58 on the upper end of vthe replacement roll web holding mechanism I23, (Figure 2), in a manner to be hereinafter described. The said cutter mechanism, best shown in Figures 3 and 4 and Figures 9 to 15, comprises a cutter blade 93 slidably mounted between the upper and lower plates I30, I3I of the sheath 92. Guide studs I32 pass through the upper and lower sheath plates and through angularly disposed guide slots I33 in the cutter blade 93. A spring I34, tensioned between one end I35 of the cutter blade 93 and a pin I350 between the sheath plates I30, I3I and positioned within a recess I39 in said sheath, is adapted to pull the cutter blade from a normally inoperative or locked position as shown in Figure 9, to a cutting position as shown in Figure 10, A resetting handle I31 is secured to the cutter blade and comprises two posts I38 and I39 which project through clearance openings I, I in the sheath plates and are joined together as shown in Figure 15,

A means is provided for locking the said cutter blade in its retracted position, which comprises a rocking arm I42 secured to a rock shaft I43, and has a pin I44 secured at the outer end thereof, which is adapted to engage an opening I45 in the cutter blade 93 and thereby provide a latch for said cutter blade when retracted. (See Figure 13.) The said rock shaft I43 is mounted in bearings I49 provided at the lower ends of the cutter frame arms 9I9Ia. A coil spring I 41 mounted over the shaft I43 (see bearing I45 and the other end secured to a collar I48 flxed to the shaft I43 and is tensioned so as to normally hold the latch pin I44 on the arm I42 in engagement with the opening I45 in the cutter blade 93. A rocking lever I49 is also secured to one end of the shaft I43.

A shaft I5I is supported by bearings I52 secured to the lower surface of the web deflector frame beam 88, as shown in Figures 3 and 4," and has mounted thereon a lever I53 which lever is joined to the above rocking lever I49 by means of a link I54.

The front of said lever I53 is shown as spaced a short distance away from the bottom of the beam 39, which distance is increased when the web deflector moves forward to the web joining position. The lug I53, previously referred to as on the upper end of the web holding mechanism I23, rotates with theweb roll 32b and is adapted to strike the lower free end of the lever I53 and rock same about the shaft I5I. This movement, will cause the link I54 to move upward and the rocking, lever I49 to be rocked in a counterclockwise direction. The arm I42 will thus be rocked to release-the latch pin I44 from the opening I45 in the cutter blade 93 and thereby allow the cutter blade to be snapped diagonally forward under the influence of the spring I34 so that its toothed edge will extend beyond the forward edge of the sheath 92 to pierce the web of the expiring-web roll below the Join. It is to be particularly noted that the web of the expiring web roll will be stretched tightly across the ends of the upper and lower sheath plates I39 and I3I, when the cutter frame is lowered to a web joining and cutting position, as is clearly shown in Figures 2 and 4. Therefor the taut condition of the web at this point at the end of the sheath plates will cause the teeth of the cutter blade to easily penetrate-the web and sever same.'

At the time a join is being made, it is desirable to break the circuit to the motor 54 to prevent same from varying the pressure. of the belt 34 upon the replacement web roll 32b. A circuit controlling mechanism is therefor provided which comprises a switch I55 secured to the bracket 81 and has a switch actuating arm I56 mounted thereon. A cam plate I51 shown in Figures 3, 4 and 6, is secured to the tension spring lever I03 on the web deflecting frame shaft 84 and is adapted to be rocked when the twin frame structure is moved to and from a web joining position. Referring to Figure 6, the switch actuating arm I56 is shown as moved to a motor circuit breaking position by the cam plate I51, which position agrees with the lowered position of the twin frame structure shown in Figure 4. Immediately after the web deflector frame is released to join the web, the cam plate I51 will pass beyond the switch actuating arm I56 and said arm I56 will drop to its normal vertical position indicated in dotted lines. On the return movement of the cam plate I51, i.'e., when the twin frame structure is raised, the switch actuating arm will be kicked upward without effecting the switch, then will drop back to its normal vertical position.

A limit switch is also provided at I59, Figures 2 and 5, and has an operating arm I6I with a roller I62 at the end thereof, which roller extends in the path of a lug I63 on the hub of the gear segment 58. If the arms 45 are raised beyond a' certain predetermined limit the lug I63 will strike the roller I62 and break the circuit to the motor 54 to make same inoperative for the less tension movements of the arms 45-.

The various limit switches, operating motors, etc heretofore referred to and other solenoids, relays and the like are indicated diagrammatically in the wiring diagram illustrated in Figure 24 including all of the circuits therefor, all of which cooperate in the complete operation of the apparatus.

Referring to said wiring diagram, many of the parts as previously described, are diagrammatically shown and also some which have not as yet been described, such as an emergency stop operating relay l1I which is energized to actuate the motor 54 whereby braking pressure is applied to the belts 34, a mainmotor relay I12 which is energized simultaneously with the main driving motor contactor coil (not shown) and a threader relay indicated at I13 which is energized only when the press drive is operating at web threading speed. The purpose of the latter relay is to open the circuit to the switch 12 by breaking the circuit on the contacts 224 and to close the circuit to the switch H by bridging the contact 224, whereby the motor 54 is permitted to operate for less tension, but is inoperative for more tension. At I14 a relay is shown for energizing the ma netic brake 55 and to provide a normally closed contact 205 when deenergized; I15 and I16 indicate relays for actuating the motor 54 in a direction to decrease or increase the belt tension respectively; I11 is a relay which is energized by the upper. push button 3Ia in the mounting 3| to drive the reel 21 in a forward or counterclockwise direction, and I18 is a similar relay which is actuated by the lower push button 3Ib to reverse the direction of the reel 21.

The position of the parts shown in the diagram indicate a normal operating position with the main motor driving, and agree with the positions shown in Figures 1 and 18, wherein the web W is being drawn from the running web roll 32a and the web joining and cutting mechanism are in a raised or non-operative position.

While the mechanism is running normally with the web feeding at the desired tension, the motor 54 is idle and the magnetic brake circuit is deenergized, thus causing the motor brake 55 to hold and thereby maintain the arm 45 in a fixed position.

As soon as the tension of the running web varies, it immediately causes a change in position of the floating roller 59 and rocks the cam shoe 69 to the right or to the left to close one of the two switches H or 12. If the tension of the running web is more than the desired tension, the said cam shoe '69 will rock to the left and cause the contacts on the switch H to be closed. When said contacts are closed, a circuit is completed to the motor 54 which is traced from. the line L2v through conductor 203, normally closed contacts I59, conductor 202, relay coil I15, conductor 2M and the closed switch 1 I, then through the conductor 204', normally closed contacts 205, conductor 206, closed contacts 201, conductor 208, closed contacts 209, conductor 2l0, closed contacts, 2 and conductor 2I2 to the line LI. The relay I15 is thus energized which closes three sets of contacts 2I3, 2I4 and 220 which energize the motor 54, and the circuit to the brake 55. The circuit to energize the motor is a conventional three phase circuit from line LI, L2 and L3, and may be traced as follows: From Ll through conductors 249 and 250 through contactor 220, conductor 214 to motor 54 from L2 through conductor 2I6, contactor 2I4, conductor 2" to motor 54; from L3 through conductor 2 I5, contactor 2 I 3, conductor 2 I8 to motor 54.The motor 54 is thereby driven in a direction which will reduce the braking pressure of the belt 34 upon the running web roll until the floating web roller 59 returns to its normal running position, whereupon the circuit is again broken.

When the tension of the running web is less than the desired tension the floating roller will drop and the cam shoe 69 will rock to close the switch 12 and thereby cause a circuit to be closed which will drive the motor 54 in a reverse direction to provide a. greater braking pressure upon the running web roll through the belt 34. Said latter circuit is traced from the line L2 through the conductor 2I6, relay coil I16 and conductor 22I then through a conductor 222, switch 12 and a conductor 223, then through a normally closed contact 224, which is adapted to be opened by the action of the threader relay coil I13, then through the conductor 204 and the normally closed contact 205, through the conductor 206, closed contacts 201 of the main motor, then through the aforesaid conductor 208, contacts 209, conductor I0, switch 2I I, and conductor 2I2 to the line LI. The relay coil I16 is thus energized which closes three sets of contacts, 225, 226 and 240 and connects the motor 54 with the line LI, L2 and L3 and also energizes the circuit to the brake 55. The circuit which is set up under these conditions will reverse the drive of the motor 54 to increase the braking tension of the belt 34 on the running web rfil 32a, and may be traced as follows: LI through conductors 249, 285, contact 240, conductor 214, to motor 54'. From L2 through conductors 2I6, 221, contacts 225, conductor 2; 'to motor 54. From L3 through conductors 2 I5, 228, contact 226, conductor 2l1 to motor 54.

' When the running web roll 32a is reduced in size to about the proportionate size shown in Figure 19, the attendant will press the upper button 3 la in the push button box 3| to close a circuit to the reel driving motor M, which will drive the said reel in a counter-clockwise direction to move the running web roll 32a and a replacement roll 32b to the relative positions shown in Figure 20 and Figure 2. The circuit completed by pressing the said upper button is traced from the line L2, through conductor 23I, relay coil I11, conductor 232, push button 3Ia, conductors 233, 234 and 2l2 to the line LI. A similar circuit, which is energized when. the lower push button 3Ib is pushed to reverse the direction of the reel, is traced from the line L2 through the conductors 23Iand 244, 245, relay coil I18,-conductor 235, push button 3"), conductors 233, 234 and 2I2 to the line LI.

The energization of either of the above mentioned push buttons 3Ia or 3) will thus energize one of the coils I11 or I18, whereby contacts are made tocomplete a circuit to the motor M to drive same in a forward or reverse direction and to energize the circuit to the brake magnet in motor 54 and also tobreak the circuit to switches H or 12 in order to make the motor circuit inoperative while the reel is moving. The circuit to energize the motor M is also a conventional three phase circuit from line LI, L2 and L3. The circuit to the motor M while turning the reel in a counter-clockwise direction may be traced as follows: From L2 through conductor 23I, contact 236, conductors 231, 238 to motor M. From L3 through conductor 243, contact 242, conductors 24I and 239, to motor M. From LI through conductor 2 I2, conductor 234 to motor M. The circuit to the motor while the reel is being rotated in a clockwise direction may be traced as follows: From L2 conductors 23I, 244 and 245, contact 246, conductor 239 to motor M. From L3 through conductor 243, 248, contact 241, conductor 238 to motor M. From LI through conductors 2 I2, and conductor 234 to motor M. At the same time, one of the normally closed contactors 289 or 2 is opened by either of the energized relay coils I11 or I18, to open the circuit to the switches 1| and 12 thereby making them inoperative regardless of the position of the cam shoe 69. Also, at this time, a circuit is completed through the magnetic brake to energize same which is traced for the contacts'of relay I11 from the line LI, through conductors 2I2 and 25I, contact 252, conductors 253, 254, electro-magnetic brake 55, conductors 255 and 23I, to the line L2. Said energizing of the magnetic brake is also traced for the contacts of the relay I18 from the line LI, through conductors 2l2 and 256, contacts 251, conductor 254, electro-magnetic brake 55, conductors 255 and 23I, to the line L2;

The replacement web roll 32b having taken the position previously occupied by the running roll 32a, as in Figures 2 and 2.0, the attendant next swings the twin frame structure 8I downward to the position also shown in Figures 2 and 20 and is then ready to join the running web to the web of the replacement roll, the speed of the latter having been accelerated to substantially the same speed as the running web by engagement of the roll-with thebelts 34.

When the running web roll has been reduced to a predetermined size, the attendant will press the push button I29 on the arm 33 which supports the replacement roll, which will cause the web deflector and brush portion to be drawn'forward after the switch I28 is closed, to effect a join between the running web and the web replacement roll and after said join is completed the running web is out below the join as previously described.

The parts which are electrically operated when the push button I 29 is pressedare traced through the circuit as follows:

From the line LI the circuit is completed through conductors 2l2, 234, 268 and 26I, one brush 262 and slip ring 263, conductor 218, switch contactor I21, conductorrl28, push button I29, conductor 21I, then through slip ring 265, brush 264, a conductor 266 and relay coil I19, then through conductors 261, 268, 244- and 23I to the line L2. The-slip rings 263 and 265 are suitably mounted over the reel shaft 28 to rotate with the reel 21 and the brushes 262 and 264 are suitably mounted so as to remain in contact with the said slip rings. When the push button I29 is pressed the circuit will not be completed until the switch I21 is closed by the cam I26, which cam and push button are connected in series with the conductors 218 and 21I, which conductors are secured to the slip rings 265' and 263 respectively. A completed circuit through the above will thus energize the relay solenoid I19 and cause a circuit to be completed to the latch releasing solenoid II to release the web deflector frame 82 asaforedescribed. The circuit through the said solenoid I I5 is completed from the line L2 through conductors 23I, 244, 268, contacts 212, conductor 213 through solenoid 5, then through conductors 268, 234, and 2l2 to the line LI. I

During the last part of the period that the twin frame structure 8| is swung downward and until the web join is made, the circuits to the motor 54 are broken and the motor brake circuit is energized. These conditions are the result of the engagement of the cam plate I51 with the switch actuating arm I56 of the switch I55, which cam plate is movable with the shaft 84 that supports the web deflector frame 82. When the above condition occurs, a circuit is completed to energize the relay solenoid I14, which will open the normally closed contacts 285 thereby making the motor 54 inoperative, and is traced from the line L2 through conductor 283, relay coil I14, conductor 288, closed contacts on switch I55, conductor 28I, conductor 286, contacts 281, conductor 288, contacts 289, conductor 2I8, contacts 2, conductor 2l2 to line LI. The relay coil I14, having thus been energized, will open the normally closed contacts 285 which will open the circuit between the motor 54 and the cam actuated switches H and 12, to prevent any movement of the floating web roller from energizing the motor circuit. Said energized relay coil I14 will also cause a closure to be made of the contacts 282 which will complete a circuit to the magnetic brake 55 and is traced from the line L2 through conductor 23I and 255, magnetic brake 55, conductor 283, contacts 282, conductors 284 and 286, contacts 281, conductor 288, contacts 289, conductor 2I8, contacts 2 andconductor 2l2 to the line LI.

In addition to the functions previously described, provision is made for applying additional braking action to the web roll when the press is decelerated rapidly. Controllers for newspaper presses are generally provided with an emergency stopping button, which in addition to breaking the circuit to the motor is usually arranged toapply brakes to the motor and to the printing cylinders. In Figure 24 relay "I is indicated and it is intended that this be connected in circuit so as to be operated by the emergency stop push button. Thus when the machine is stopped quickly this relay is energized, closing contacts 286 which completes a circuit that may be traced from Ll through conductor-249, contacts 286, conductor 22L and relay I16 to L2. The motor 54 is thereby energized in the same manner as when-operated to increase tension on the web, and the increased braking pressure on the roll is maintained until the relay Ill is deenergized on the stopping of the press driving motor.

After the join is made and the cutter 93 is actuated to sever the running web as previously described, the cam plate I51 will move beyond the arm I56 to permit same to drop and cause the switch I55 to open, thereby returning the complete circuit to its normal running condition.

It is to be understood that while the foregoing description of the electrical circuits relates to the use of alternating current as the power source that direct current may be used, if desired, and that any alterations in the wiring which are required for the change of current can readily be made by those familiar with this art.

In Figures 22 and-23 a modified arrangement of web guide means is shown in which a movable guide roller is employed that is adapted to move with the endless belt mounting and by its movement will take up slack in the running web or'provide slack as desired at the time the endless belt mechanism is acted upon to increase or decrease the braking pressure upon the running web roll. In other words when the floating roller 59 changes its position and the shoe 69 closes an electrical circuit to the motor 54, through the switches II or 12, the arms 45 of the endless belt mechanism will be moved to vary the braking pressure of the belts 34 upon the running web roll and during the interim that such change is occurring, a web guide means which is movable with the arms 45,

will assist in correcting the slack or taut web condition.

The mechanism herein disclosed for accomplishing the above, comprises a guide roller 300, which is rotatably mounted in bearings 31" formed at the end of rocker arms 302. One of said rocker arms is shown in Figures 22 and 23 and is keyed to the shaft 43 upon which shaft the arms 45 are also fixed. It will be obvious then, that a condition in the running web which will cause the arms 45 to be moved, will also cause a movement of the rocker arm 302 in the same direction and the movement of the rocker arms .will cause the guide roller 30!! to be moved in the desired direction to take up or provide slack in the running web at the time a correction is being made by varying the braking pressure of the belts 34 upon the running web roll.

It will be observed from the foregoing that a simplified form of web supply mechanism and means for controlling same has been provided which is positive in operation and permits a web join to be made between the web of an expiring web roll and that of a replacement roll, in a most efiicient manner. Y

It will be understood that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore desired that the present embodiment be considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.

What we claim is:

1. In a mechanism for controlling the web feed to a printing machine, an endless belt engaging the peripheral surface of a web roll, a pivotally supported frame having pulleys thereon to sup- Port said belt, means to drive said belt, a floating web guide roller, and means actuatedby the movement of said floating roller to increase or decrease the wrap of the belt upon theweb roll in varying degree in response to variation in web tension by a swinging movement of the frame.

2. In a mechanism for controlling the web feed to a printing machine, an endless belt engaging the peripheral surface of a web roll, a. pivotally supported frame having pulleys thereon to support said endless belt, an additional pulley engaging the belt, driving connections between the additional pulley and the machine, a floating web guide roller, and means actuated by movement of the floating guide roller to increase or decrease the pressure of the endless belt upon the web roll in varying degree in response to variation in web.

tension and thereby maintain a constant tension on the running web which is drawn through the printing machine.

3. In a mechanism for controlling the web feed to a printing machine, an endless belt engaging the peripheral surface of a web roll, pulleys to support said belt, a drive for one of said pulleys, a motor driven means adapted to vary the position of another of said pulleys and thereby vary the wrap and pressure of the belt upon the web roll, a floating web guide roller adapted to be moved when a change in tension occurs upon the running web, an electrical circuit closing means adapted to be actuated by a change in position of the floating web roller whereby the motor which varies the position of the pulley, is energized and is driven in a direction which will compensate for a. variation in tension in the running web.

4; In a mechanism for controlling the web feed to a printing machine, a floating web guide roller running in a loop in the vweb, an endless belt engaging the peripheral surface of a web roll, two pulleys for said belt having fixed axes and a pulley having a movable axis, a drive for one of said pulleys, means for bodily moving the pulley on said movable axis to increase or decrease the wrap of the belt upon the web roll in varying degree in response to variation in web tension and thereby vary the braking pressure on said roll, and means actuated by the movement of the floating web guide roller, to control the said variable pressure movement of the belt.

5. In a web supply mechanism for a machine operating on' a web drawn from a web roll, a. roll support adapted to move a replacement web roll from a loading position to a running position, a floating roller running in a loop of a web being fed to the machine and moving in response to variations in web tension, a driven belt e'ngaging the periphery of a roll in running position, electrically operated means operably connected to the floating roller and arranged to vary the pressure of the belt on the roll when the position of the floating roller is changed, said means being rendered ineffective when the roll support is being moved.

6. In a web supply mechanism for a machine operating on a web drawn from a web roll, a roll support adapted to move a replacement web roll from a loading position to a running position, a floating roller running in a loop of a web being fed to the machine and moving in response to variations in web tension, a'roll controlling belt engaging the periphery of a roll in running position, pulleys to support said belt one of which is driven, electrically operated means operably con- 15 nected to the floating roller, and means cooperat- 1 ing therewith to vary the pressure of the belt upon the roll when the position of the floating roller is changed, said electrically operated means being rendered ineffective when the roll support is beingmoved.

7. In a web supply mechanism fora machine operating on a web drawn from a web roll, a roll support adapted to move a replacement web roll from a loading position to a running position, a floating roller running in a loop of a web being fed to the machine and moving in response to variations in web tension, an endless belt engaging the periphery of a roll in running position, pulleys to support said belt, one of said pulleys being driven by the machine, means to change the position of another of said pulleys, electrically operated means operably connected to the floating roller and to the pulley position changing means to vary the pressure of the belt upon the roll according to variations in web tension indicated by changes in position of the floating web roller, and means to render said pulley position changing means ineffective when the roll support is being moved.

8. In a web supply mechanism for a machine operating ona web drawn from a web roll, a roll support adapted to move a replacement web roll from a loading position to a running position, a floating roller running in a loop of a web being fed to the machine and moving in response to variations in web tension, an endless belt engaging the periphery of a roll in running position, pulleys to support said belt, one of said pulleys being driven by the machine, a swinging support for another of said pulleys and a motor to swing saidisupport to raise or lower the position of said latter pulley, electrically-operated means operably connecting the floating roller 'with the said motor whereby changes in the position of the floating roller will effect the position of the swinging support to varythe pressure of the belt upon the roll.

9..In a web supply mechanism for a machine operating on a web drawn from a web roll, a roll support adapted to move a replacement web roll from a loading position to a running position, a floating roller running in a loop of a web being fed to the machine and moving in response to variations in web tension, a driven belt engaging the periphery of a roll in running position, electrically operated means operably connected to the floating roller and arranged to vary the pressure of the belt on the roll when the position of the floating roller is changed, said means being rendered ineffective when the roll is being accelerated preparatory to making a web join.

10. In a web supply mechanism for a machine operating on a web drawn from a web roll, a roll controlling belt engaging the periphery of theroll, a swinging support pivoted on a fixed axis, a plurality ,of pulleys for the belt including an idler pulley supported on the swinging support, and a driving pulley operably connected to the machine and supported on a fixed axis at a point remote from said support, and means for swinging said support to increase or decrease the arc of contact of the belt on the roll in varying degree in response to variation inweb tension.

11. In a web supply mechanism for a machine operating upon a web drawn froma web roll, a roll controlling belt engaging the periphery of the roll, pulleys to support said belt, a swinging arm to support one of said pulleys, means to drive said belt, and means to swing said arm whereby the wrap of the belt around the web roll may be increased or decreased in varying degree in response to variation in web tension.

12. In a mechanism for controlling the web feed to a printing machine, an endless belt engaging the peripheral surface of a web roll, a pivotally supported frame having pulleys thereon to support said belt, means to drive said belt, a floating web guide roller, means actuated by the movement of said floating roller to vary the wrap of the belt upon the web roll by a swinging movement of the frame, and means to independently correct a change in condition of the web at the time the swinging frame is actuated.

13. In a mechanism for controlling the web feed to a printing machine, an endless belt engaging the peripheral surface of a web roll, a pivotallysupported frame having pulleys thereon to support said endless belt, driving connections between said belt and the machine, a floating web guide roller and means actuated by the movement of the floating guide roller to vary the pressure of the endless belt upon the web roll, and means to independently correct a change in condition of the webat the time the pressure of the belt is varied.

' 14. In a mechanism for controlling the web feed to a printing machine, an endless belt engaging the peripheral surface of a web roll, a pivotally supported frame having pulleys thereon to support said belt, a drive for said belt, means whereby said frame may be moved to vary the pressure of the belt upon the web roll, and a web guide roller movable with said frame to correct a change in condition of the web at the time the frame is moved.

15. In a mechanism for controlling the web feed to a printing machine, an endless belt engaging the peripheral surface of a web roll, pul-- leys to support said belt, a frame supporting one of said pulleys, means to move said frame to vary the pressure of the belt upon the web roll, and a web guide roll movable with said frame.

16. In a mechanism for controlling the rotation of an unwinding web roll, a member movable toward the roll to apply pressure thereon, a floating roller running in a loop in the web and moving in response to variation in the web feed, a second roller movable with said member and around which the web is led, and means for moving said member in response to movement of the floating roller.

17. In a mechanism for controlling the web feed to a printing machine from a web roll, a web roll control device operated in response to variation in the feed of the web and including a 'swingable member adapted to apply pressure upon the web roll, and a web guide roller running in a loop in the web and movable with said member.

18. In a mechanism for controlling the web feed from a web roll to a. printing machine, a floating roller running in a loop of the web and movable in response to variations in web tension, a driven belt engaging the periphery of the web roll, electrically operated means operably connected to the floating roller and arranged to vary pressure of the belt on the web roll when the position of the floating roller is changed.

19. In a mechanism for controlling theweb feed to a machine operating upon a web, a web roll support adapted to rotatively support a web roll, means including a driven belt operatively associated with the web roll to control the rotation of the web roll on said support, and'means operable in response to variations in the tension roll support adapted to rotatively support a web roll and to move the same into operative positions, means to control therotation of the web roll on said support, and means operable in response to variations in the tension of the web running from the roll on said support to actuate said roll rotation controlling means to increase or decrease its efiective action on the roll in varying degree, and means to prevent operation of said roll rotation control when said roll support is operating to move a roll into operative position.

21. In combination with a machine adapted to operate upon a web, a web roll supporting reel, electrical means to rotate said reel, mechanism movable into operative position for joining the web of a roll supported on'said reel with a web running into said machine, electrical means for controlling said web joining mechanism, a web tensioning device, electrical means for controlling said tensioning device, electrical interlocking means between said mechanism and said device controls to cause said web tensioning device to be inoperative when said web joining mechanism is in operation.

22. In a web supply mechanism, a web tensioning device including a member movable into and out of engagement with a rotatable web roll to 7 control the speed of rotation thereof, means to 23. In a mechanism for controlling the web running from a web roll into a machine adapted to operate thereon, a swingable arm, an endless driven belt carried by said arm and engaging the peripheral surface of the roll, a member in engagement with the running web and adapted to be moved by variations in web tension, and an electric motor controlled by saidmember and operative to swing said arm to increase and alternatively to decrease. the pressure of the belt upon said roll in response to variations in web tension.

24. In a mechanism for controlling. the running web from a web roll into a machine adapted to operate thereon, an endless driven belt engaging the peripheral surface of the roll, a member in engagement with the running web and adapted to be moved by variations in web tension, and means actuated by said member to increase and alternatively to decrease the wrap 01 the belt about the web roll.

25. In a mechanism for controlling the running web fed from a web roll to a machine operating on the web, an endless belt engaging the web roll, a swingable arm supporting saidbelt, and an electric motor drivingly connected to said arm to swing it to increase and alternatively to decrease the wrap of the belt about 'the periphery of the roll to maintain the running web at a desired tension.

26. In a mechanism for controlling the running web fed from a web roll to a machine operating on the web, an endless belt engaging the web roll, an arm supporting said belt, and means operable in response to variations in the tension of the running web to move said arm to increase and alternatively to decrease the wrap of the belt about the periphery of the. roll to maintain the nmning web at a desired tension.

27. In a device for controlling the tension on a web being drawn from a web roll, an arm mounted to swing toward the periphery of the roll from which the web is being drawn, an endless belt movable by and with the arm into contact with the roll and being adapted to be driven to rotate the roll, an electric motor drivinglyvconnected to said arm to swing it, and means to control said motor to constantly maintain said belt in contact with the roll as the roll decreases in diameter due to the web being drawn therefrom.

'28. In a device for controlling the tension on a web being drawn from a web roll, a swinging arm, a friction member movable by and withthe arm, an electric motor to swing the arm to maintain the friction member in contact with the roll, and means for controlling the motorto move the arm as the roll decreases in size due to the web being drawn therefrom.-

ARVID LUNDQUIST. RAYMOND a. ram. WILLIAM c. wramNG. 

